Improvement in double-acting steam-pumps



A. F. HALL. Double-Acting Steam-Pump.

No. 199,288. Patented Jan. 15,1878..

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N. PETERS, PHOYO-LITHOGHAPHER. WASNINGTNy D. C.

UNITED" .ST-Arens PATENT OFFICE'.

ALBERT F. HALL, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO GEORGE F.

BLAKE MANUFACTURING COMPANY,

OF SAME PLACE.

IMPROVEMENT IN DOUBLE-ACTING,STEAM-PUMPS.

Specification forming part of Letters Patent No. 199,288, dated January 15,1878; application iiled f November 13, 1877.

To all whom it may concern: Be it known that I,`ALBnR'r F. HALL, of Boston, in the county of Sniolk and State of Massachusetts, have invented an Improvement in Double-Actin g Steam-Pumps, of which the following' is a specification: This invention relates to improvements in steam-pumps to be employed either for compressing or exhausting air or gases accompanied or not with fluids.

In this invention the inlet and discharge chambers are in a top formed as a single casting, preferablydome-shaped and ilanged, to be placedupon a metallic valve-plate sustained by the iianged portions of a casting, which I denominate the fluid-chamber, such casting containing the pump cylinder. This valve- 'plate has a series of seats for the inlet and discharge valves, the faces of these seats being on opposite sides, so that the valves open in opposite directions thereom.

The upper and lower ilanged castings, forming the main portion of the pimip, are held together by bolts passing through the anges and the edge of the valve-plate.

Figure 1 of the accompanying drawings shows in vertical longitudinal section a pump .provided with my improvements; Fig. 2, a section on the line a; x; Fig. 3, a top view 5 and Fig. 4 shows at the right the upper portion of the fluid-chamber casting, and at the left a portion of the valve-plate resting thereon.

The huid-chamber a, rising above and containing within it the pump-cylinder b, both preferably in one casting, has about its top a iiange, c, to sustain the valveplate d. This fluid-chamber a, is divided by a partition, c, into two parts, each of which is capable of containing a quantity of iuid equal to or greater th an the volume of the iiuid displaced from the pump-cylinder b at each stroke of the piston jl The top g of the fluid-chamber is provided with openings h h, communicating with the discharge-valves z', and with an opening, j, .communicating with the inlet-valve k.

These openings h` and j are connected by channel-ways Z, which act to prevent the accumulation or retention in the opening j of the material being pumped, such material escaping through the channels Z into the openings h when the iiuid in the fluid-chamber rises.

It will be seen by this construction that every particle of the air or other material being pumped vis expelled at each rise oi the fluid in the fluid-chamber.

'Each compartment of this fluid-chamber has an opening, m, covered by a plate, by which access may be had tothe 'inletvalves lr. valvevplate d has on its upper side a series ot' seats, 2, for the discharge-valves, and on its lowerside Va series of seats, 3, for the inletvalves. These valves are and may be of any usual construction. The outer edge of this valve-plate rests upon the upper portion of the fluid-chamber, and its edges extend over the iiange c.

By this construction it is obvious that all the valves may be simultaneously placed in posi- Vtion with reference to the fluid-chamber, and

that the valve mechanism is simplified and cheapened. more than would be the case were the valves on separate plates and upon different levels, as now common. This valve-plate will be bolted to the partition e and to the lower portions 4 of the top p. This top sustains a chamber, g, communicating with the inlet-valves, and a chamber, r, communicating with the discharge-val ves, and at its lower end is provided with a lian ge, s, to receive bolts t through it, and the valve-plate and the iiange c,

by which such parts are firmly bolted together, f suitable packing being used between them.

The top has an inlet-opening, a, surrounded by a iiange to connect with the inlet-pipe and discharge-openings o, surrounded by a ange, either or both of which may be connected with discharge-pipes, and it has also one or more hand-holes, w, by which to gain access to the discharge-valves.

To support the piston and prevent it from wearing away the lower portion of the pumpcylinder, the rear end ofthe piston-rod is sustained in a bushing, x, which may be turned as its wears.

The extreme end of the piston-rod passes into a cylinder, y, which communicates by holes 5 with the interior of cylinder b, such holes receiving water to lill the cylinder y when the piston-rod is withdrawn.

In operation the piston at each reciprocation is followed by the luid in the fluid-chamber,

but the uid never descends low enough toy The o leave the face of the piston unimmersed, so when the piston makes its return stroke the fluid moved before it ascends in the chamber up to and touches the bottom of the dischargevalves, displacing all the air or gas within the Huid-chamber.

In this invention the steam and pump pistons are directly connected, as in Patent No. 60,852, thereby constituting a so-called direct-acting pump, all cranks and gears for moving the piston being dispensed with.

The inlet-valves are arranged, it will be no- V ticed, to open downward, so as to operate with the greatest ease and with the least resistance. This is of much importance, especially when pumping gases and vapors from condensers and exhausting the vacuum-pans used in the manufacture of sugar. A

The valve-plate d may be omitted, and either inlet or discharge valve seats, or both, may be made in, or secured in, a cover or plate formed in the upper portion g of the fluid-chamber, or in a portion, like g, attached to the lower portion of the top, though the construction here shown is preferred.

I claiml. The combination, with the flanged top, provided with inlet and discharge openings,

and the flanged fluid-chamber, of the valveplate interposed between the top and chamber, and provided with the inlet and discharge valves, the parts being all bolted. together, substantially as described.

2. The fluid-chamber provided with openings h j and channels l, in combination with inlet and discharge valves, to operate all substantially as described.

3. In a direct-acting pump, the top provided with the inlet and discharge openings, and the duid-chamber connected with and containing the pump-cylinder, in combination with inletvalves opening downward into such chamber, and discharge -valves opening upward from such chamber, all substantially as described.

4. The combination, with the cylinder-head and an adjustable bushing, a', of a cylinder, y, communicating with the main cylinder by means of openings 5, and containing the end of the piston-rod, substantially as described.

In testimony whereof I have signed my name to this specication in the presence of two subscribing witnesses.

ALBERT F. HALL.

Witnesses:

Gr. W. GREGORY, S. B. KIDDER. 

